CVE-2021-21803 Cross-site scripting in Advantech
Attackers can execute arbitrary JavaScript in victims' browsers via crafted URLs in Advantech R-SeeNet, potentially leading to session hijacking or malicious actions.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2021-21803?
CVE-2021-21803 is a critical cross-site scripting vulnerability in Advantech, published on 16 Jul 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
This vulnerability is present in device_graph_page.php script, which is a part of the Advantech R-SeeNet web applications. A specially crafted URL by an attacker and visited by a victim can lead to arbitrary JavaScript code execution.
Weakness: CWE-79
Which versions are affected by CVE-2021-21803?
It affects 1 product.
Products include Advantech R-Seenet.
How do I fix CVE-2021-21803?
No fix has been published for CVE-2021-21803 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2021-21803 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-21803 exists.
Public exploit code: 1 Nuclei template.
Other vulnerabilities in Advantech
Sources
Also known as GHSA-2fvw-6h8p-qwr7.